Lake Lamoure
LaMoure County, North Dakota494 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- 30 ft max depth
- Public access
- Limited data
Lake Lamoure in LaMoure County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Chlorophyll-a (algae): 18.4 µg/L. Surface area: 494.1 acres.
- Clarity
- 8 ft
- Typical in August
- 63°F
- Max depth
- ~30 ft est.
- Area
- 494 acres
- Public access
- Yes
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Watch Lake Lamoure’s letter
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Why Lake Lamoure has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Lamoure, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by NDDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Lamoure is a 494-acre lake in LaMoure County, North Dakota with an estimated average depth of about 30 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2021-10-01. Grade methodology: LakeQuality methodology.
What Lake Lamoure is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lake Lamoure
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8 ft. Chlorophyll-a 18.4 µg/L. TSI 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 18.4 µg/L | Not graded |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
Lake Lamoure typically sits around 63°F at the surface in August. Summer average is about 61°F. Usually warmest in Aug (about 63°F) and coldest in May (about 48°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 14 field readings (2019–2021) via the EPA Water Quality Portal. See the full Lake Lamoure water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~30 ft est. |
| Average Depth | ~12 ft est. |
| Surface Area | 494 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. North Dakota has not published bathymetry for Lake Lamoure.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Lake LaMourePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Lamoure
Reservoir Info (USACE NID)
Lake Lamoure is a man-made reservoir impounded by the Cottonwood Creek Dam (completed 1973), built primarily for recreation on the Cottonwood Creek; earth-type dam, 76 ft tall and 1,380 ft long.
- Surface area
- 494.1 ac
- Normal storage
- 8,076 ac-ft
- Max storage
- 16,839 ac-ft
- Drainage area
- 240 sq mi
- Hazard class
- Significant
- Owner
- City of LaMoure
All listed purposes: Recreation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID ND00011 · Operator website
Graded lakes near Lake Lamoure
Lake Lamoure has no grade, but these lakes within a short drive do.
Nearby Lakes in LaMoure County
Frequently asked questions about Lake Lamoure
Where is Lake Lamoure?
- Lake Lamoure is a lake in LaMoure County, North Dakota. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lake Lamoure?
- Lake Lamoure in LaMoure County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Chlorophyll-a (algae): 18.4 µg/L. Surface area: 494.1 acres.
Is Lake Lamoure safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lake Lamoure?
- Lake Lamoure typically sits around 63°F at the surface in August, from 14 EPA Water Quality Portal field readings (2019–2021). That is a typical value for the month, not a live reading.
How deep is Lake Lamoure?
- No published bathymetric survey covers Lake Lamoure, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 30 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 494.1 acres.
Are there boat ramps on Lake Lamoure?
- Lake Lamoure has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake LaMoure. Public access is listed as yes.
Explore Lake Lamoure across LakeQuality
Depth, room, public access, and the state wake-sport rules
22.5 mi away · 8 ft
Species activity outlook by water temperature and season
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North Dakota's cleanest and most-polluted lakes, ranked
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Where this data comes from
8 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX8 samples · 2021
Analytical methods
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Depth, fish, and access data from North Dakota Game & Fish
Named boat-access points from the USGS National Boat Ramps inventory